@layer reset, config, font, utilities, theme;
@import "reset.css" layer(reset);
@import "theme.css" layer(theme);

/* The chromatic-aberration offset, as a 0..1 multiplier of
   --crt-aberration-max. Registering it gives it a typed initial value, so the
   calc() in body's text-shadow stays valid when the animation is not running.
   Note the var(--crt-shift, 0) fallbacks at the use sites: without one, an
   unresolved --crt-shift makes the calc() invalid at computed-value time,
   which drops the *whole* text-shadow — glow included — not just the smear.
   The animation itself does not depend on this rule, because step-end never
   interpolates; it only ever substitutes a literal keyframe value. */
@property --crt-shift {
  syntax: "<number>";
  inherits: true;
  initial-value: 0;
}

@font-face {
  font-family: "unscii16";
  src:
    url("unscii-16.woff") format("woff"),
    url("unscii-16.ttf") format("ttf");
}
@font-face {
  font-family: "unscii8";
  src:
    url("unscii-8.woff") format("woff"),
    url("unscii-8.ttf") format("ttf");
}

@layer font {
  :root {
    /* Traditional point sizes for 16px font */
    --pt-double-canon: 3.75rem; /*60px*/
    --pt-canon: 3.25rem; /*52px*/
    --pt-double-great-primer: 2.5rem; /*40px*/
    --pt-double-english: 2rem; /*32px*/
    --pt-double-pica: 1.75rem; /*28px*/
    --pt-paragon: 1.5rem; /*24px*/
    --pt-great-primer: 1.375rem; /*22px*/
    --pt-english: 1.125rem; /*18px*/
    --pt-pica: 1rem; /*16px*/
    --pt-small-pica: 0.875rem; /*14px*/
    --pt-long-primer: 0.75rem; /*12px*/
    --pt-bourgeois: 0.625rem; /*10px*/
    --pt-minion: 0.5rem; /*8px*/
  }
}

@layer utilities {
  .hidden {
    display: none;
    visibility: hidden;
  }
}

@layer config {
  :root {
    /* Color */
    --color-fg: oklch(1 0 0);
    /* 0.62, not 0.5: at 0.5 this was 3.5:1 on the background, under AA, and
       1.7:1 against the centre of the CRT vignette. 0.62 gives 5.8:1 / 4.4:1. */
    --color-mg: oklch(0.62 0 0);
    --color-bg: oklch(0 0 0);
    --color-accent: oklch(0.6 0.18 142.5);
    --color-accent-bright: oklch(0.8 0.18 142.5);
    --color-glow: oklch(0.8328 0 0);
    --color-accent-transparent: oklch(0.6 0.18 142.5 / 50%);

    /* CRT
       The raster (scanline + aperture grille) and the phosphor (vignette,
       glow, chromatic aberration). Every value the effect uses lives here so
       the whole look can be retuned without touching the keyframes. */
    --crt-scanline-pitch: 2px;
    --crt-grille-pitch: 3px;
    --crt-scanline-color: rgb(0 0 0 / 0.25);
    --crt-grille-r: rgb(255 0 0 / 0.06);
    --crt-grille-g: rgb(0 255 0 / 0.02);
    --crt-grille-b: rgb(0 0 255 / 0.06);
    /* Deliberately not --color-accent-transparent, which ProjectCard uses for
       its box-shadow glow and wants at 50%. As a full-screen wash behind text,
       50% costs too much contrast; 25% keeps --color-mg above 4.5:1. */
    --crt-vignette-core: oklch(0.6 0.18 142.5 / 25%);
    --crt-vignette-edge: var(--color-bg);
    --crt-shadow-cool: rgb(0 30 255 / 0.5);
    --crt-shadow-warm: rgb(255 0 80 / 0.3);
    --crt-glow-blur: 3px;
    /* In em so the smear scales with the fluid root font-size. */
    --crt-aberration-max: 0.15em;
    --crt-flicker-base: 0.03;

    /* Spacing */
    --gutter-large: clamp(3ch, 2.5vmax, 3.75ch);
    --stack-large: clamp(1.25ex, 2.5vmax, 1.75ex);
    --gutter-small: clamp(0.5ch, 1vmax, 1ch);
    --stack-small: clamp(0.25ex, 0.5vmax, 0.5ex);
    --line-length: 75ch;
    --page-max-inline-size: min(
      var(--line-length),
      100dvi - var(--gutter-large) * 2
    );
    --page-padding-inline: calc((100dvi - var(--page-max-inline-size)) / 2);

    /* Typography */
    --font: unscii16, "Courier New", monospace;
    --font-alternative: unscii8, "Courier New", monospace;
    --font-weight: 400;
    --font-weight-semibold: 600;
    --font-weight-bold: 900;
    --font-size-min: 100%;
    --font-size-max: 150%;
    --font-size-clamp: clamp(
      var(--font-size-min),
      var(--font-size-min) * 0.9 + 0.5dvi,
      var(--font-size-max)
    );
    --leading: 1.4;

    /* Traditional point sizes for 12px font */
    --pt-double-canon: 4.666rem; /*56px*/
    --pt-canon: 3.999rem; /*48px*/
    --pt-double-great-primer: 2.999rem; /*36px*/
    --pt-double-english: 2.333rem; /*28px*/
    --pt-double-pica: 2rem; /*24px*/
    --pt-paragon: 1.666rem; /*20px*/
    --pt-great-primer: 1.5rem; /*18px*/
    --pt-english: 1.166rem; /*14px*/
    --pt-pica: 1rem; /*12px*/
    --pt-small-pica: 0.916rem; /*11px*/
    --pt-long-primer: 0.833rem; /*10px*/
    --pt-bourgeois: 0.75rem; /*9px*/
    --pt-minion: 0.583rem; /*7px*/

    font-size: var(--font-size-clamp);
    font: -apple-system-body;
    font-family: var(--font);
    font-weight: var(--font-weight);
    line-height: var(--leading);
    color: var(--color-fg);
    background-color: var(--color-bg);
    accent-color: var(--color-accent);
    color-scheme: dark light;
  }

  @supports (font: -apple-system-body) and
    (not (-webkit-touch-callout: default)) {
    :root {
      font-size: var(--font-size-clamp);
    }
  }

  /* The raster is specified in CSS px, so on a 2dppx panel a 2px scanline is
     4 device px — coarse, and on fractional DPR it resamples into moire.
     Tightening the pitch keeps the apparent scale roughly constant. */
  @media (min-resolution: 2dppx) {
    :root {
      --crt-scanline-pitch: 1.5px;
      --crt-grille-pitch: 2.25px;
    }
  }

  @media (prefers-color-scheme: light) {
  }

  @media (prefers-contrast: more) {
  }

  @media (prefers-reduced-motion: reduce) {
  }
}